664459229 has 8 divisors (see below), whose sum is σ = 804051648. Its totient is φ = 536034240.

The previous prime is 664459219. The next prime is 664459253. The reversal of 664459229 is 922954466.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-664459229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664459219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2791727 + ... + 2791964.

It is an arithmetic number, because the mean of its divisors is an integer number (100506456).

Almost surely, 2^664459229 is an apocalyptic number.

It is an amenable number.

664459229 is a deficient number, since it is larger than the sum of its proper divisors (139592419).

664459229 is a wasteful number, since it uses less digits than its factorization.

664459229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5583715.

The product of its digits is 933120, while the sum is 47.

The square root of 664459229 is about 25777.1066840326. The cubic root of 664459229 is about 872.6152113714.

The spelling of 664459229 in words is "six hundred sixty-four million, four hundred fifty-nine thousand, two hundred twenty-nine".